6451777654 has 32 divisors (see below), whose sum is σ = 11236492800. Its totient is φ = 2721304512.

The previous prime is 6451777649. The next prime is 6451777669. The reversal of 6451777654 is 4567771546.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221322 + ... + 248770.

It is an arithmetic number, because the mean of its divisors is an integer number (351140400).

Almost surely, 2^6451777654 is an apocalyptic number.

6451777654 is a deficient number, since it is larger than the sum of its proper divisors (4784715146).

6451777654 is a wasteful number, since it uses less digits than its factorization.

6451777654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27724.

The product of its digits is 4939200, while the sum is 52.

The square root of 6451777654 is about 80322.9584490014. The cubic root of 6451777654 is about 1861.6289785669.

The spelling of 6451777654 in words is "six billion, four hundred fifty-one million, seven hundred seventy-seven thousand, six hundred fifty-four".